Antiglare attachment for headlight bulbs



Oct. 16, 1934. J A, ROY 1,976,965

ANTIGLARE ATTACHMENT FOR HEADLIGHT BULBS Filed July 16. 1932 Patented Oct. 16, 1934 j ANTIGLAE Ar'rACnMnNrronHEADLIGHT BULBS .oseph Arthur Roy, Manchester, N. Hwassignor ofy `one-halt tri-,George E. Essie and one-fourth to Matilda Essie, both of Manchester, N. H.

Application .lilly 16, 1932, Serial No. 622,879 i calms. (oil 24o-48.6)

This inventionrelates to attachments adapted for application to thel incandescent light bulbs of automobile headlights in order to interceptl and deect klight rays tending to cause a confusing 5, glare to a pedestrian or to the driver of an approaching vehicle.

The principal purpose of the invention is to provide a deflector of this type, which is simple and economical to manufacture, easy to install and adjust according to the particular size and shape of the bulb, and operatively eicient in the interception of both direct and reflected light rays which would otherwise be projected at an upward angle while at the same time affording full utilization of both direct and reected rays which are projected horizontally or downwardly from the headlight.

Further objects of the invention reside in the improved construction of the attachment, in the :2O-shape and arrangement of its deecting shields, in the adjustable features of the deiiector elements, and in the safe and secure manner of mounting the device upon the base of the bulb, all as more fully described hereinafter and pointed out in the appended claims.

A preferred embodiment of the invention is illustrated in the accompanying drawing, in which:

Fig. 1 is a side View of the attachment as applied to the light bulb, the typical parabolic re- Yflector of an automobile headlight being shown diagrammatically;

Figs. 2 and 3 are top and bottom views respectively of the bulb and its attachment;

Fig. 4 is a side view to larger scale with the deli'lecting shields shown in section; and

Fig. 5 is a detail sectional view illustrating a preferred mode of fasteningthe shield elements of the attachment to an expansible band surrounding the bulb.

In the particular embodiment chosen for the purpose of illustration, the light-deecting attachment comprises an expansible band 6 which may consist of a narrow strip of resilient metal adapted to embrace the light bulb 7 and, by reason of its adjustable overlapping ends 8, to iit closely around bulbs which may vary in size or shape; an upper deflector member preferably consisting of two curved shields 9 and 10 of semi-opaque celluloid or other exible material pivoted together at their forward ends as by a rivet 11 and respectively fastened at their rearward edges to the overlapping end portions of the band 6 by rivets 12 or other suitable securing means; and

.'56 a lower segmental defiector or shield 13 of similar material,A secured to the band 6 in like manner. The attachment is rigidly mounted in proper position upon the bulb by means of a split collar piece 14 which -ts around the base 15 of the bulb and is secured by a suitable screw 16 `or Isimilar C3 retaining means, the collar 14 and band 'being interconnected by side braces such as the flexible, intertwisted wires 17, 18 which present theininimum of obstruction to lateral lightrays emanating Afrom the bulb filaments'. The attachment 65 may be .quickly and easily Vapplied by slipping it forwardly over the base of the bulb, and when the collar or band 14 is clamped upon the basethe band 6 and deilecting shields 9, 10 and .13 will assume their proper relative position atV the forward end of the bulb. The resilient metal band 6 will fully expand to accommodate the particular size of the bulb and will yieldingly grip the bulb without injuring the glass in any way. The overlapping segments of the complemental sections 9 and 10 of the upper shield or deiiector conform to the shape of the bulb and prevent the passage of light rays between said sections.

It will be observed that the upper shield extends forwardly of the bulb to provide an overlapping visor 19 which terminates above the 1ongitudinal axis of the bulb when the latter is applied to the headlight reflector as indicated in Fig. 1. Hence, the direct rays from the filaments may project forwardly and downwardly between the upper and lower shields, thereby affording unobstructed illumination of the road surface. Furthermore, the entire rearward portion of the bulb is substantially free from obstructions so that indirect rays may also be reflected forwardly and downwardly from the usual polished reflector 20.

Nevertheless, it will be apparent that neither direct nor reected rays may project in an upward direction because of the disposition of the upper and lower shields, thereby preventing the objectionable and dangerous glare which is characteristic of unshielded light bulbs. While the proper relative position of the shield members will vary slightly according to the size of the reflector, the angle of the band 6 may be readily adjusted by bending the bracing wiresll and 18, so that the maximum effective road light may be afforded while eliminating all upward glaring rays. I 105 From the foregoing it is apparent that I have provided a simple and elicient, anti-glare attachment for light bulbs which intercepts, diffuses or deiiects Vall objectionable upward rays while presenting a minimum of obstruction to both direct and indirect rays which give beneficial illumination forwardly and downwardly upon the road. It will be understood, however, that the structural details of the attachment may be varied as desired, except as the scope of the invention is set forth in the following claims.

I claim: v l i 1. Ananti-glare attachment for headlight bulbs comprising a narrow band adapted to embrace the bulb, upper and lower shield members connected to the band at their rearward ends and adapted to extend forwardly over the upper and lower portions of the bulb to eliminate the projection' of upward light rays, said band being of resilient material and having overlapping ends whereby it may expand to conform to the size of bulb, and the upper shield consisting of two complemental sections pivotally interconnected at their forward ends and having relatively overlapping segments fastened to 'the respective end portions of said band, and means for mounting the attachment upon the base of the bulb.

2. An anti-glare attachment for headlight bulbs, comprising a narrow, resilient metal band adapted to embrace the bulb and having overlapping ends at its top portions, an upper shield having complemental sections connected to the respective end portions of the band and having trelatively overlapping segments, pivotal means for fastening the two sections together at their forward ends, a lower shield spaced from said sections and connected to said band at the bottom portion thereof, and means for mounting the attachment upon the base of the bulb.

3. An anti-glare attachment for headlight bulbs, comprising a narrow, resilient metal band adapted to embrace the bulb and having overlapping ends at its top portion, an upper shield having complemental sections connected to the respective end portions of the band and having relatively overlapping segments, pivotal means f oruffastening the two sections together at their forward ends, a lower shield spaced from said sections and connected to said band at the bottom portion thereof, a split collar adapted to embrace the base of the bulb, clamping means for securing the collar in position, and flexible side braces interconnecting the collar and band.

4. An anti-glare attachment for headlight bulbs, comprising a narrow, resilient band adapted to encircle and yieldingly embrace the bulb,

said band being divided transversely to provide separable, normally disconnected ends, and being held in embracing position on the bulb by its resilience, so that the band will accommodate bulbs of varying size without manual adjustment, upper and lower shield members of Celluloid having curved rearward ends fastened to the upper and lower portions respectively of said band in spaced relation, the upper shield projecting forwardly beyond the bulb and beyond the lower shield, a collar adapted for attachment to the base of the bulb and side braces connecting the collar andthe band.

JOSEPH ARTHUR ROY.

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